<Swing Dev> [9] Review request for 8164032 JViewport backing store image is not scaled on HiDPI display

[Sergey Bylokhov]

On 17.08.16 14:02, Alexandr Scherbatiy wrote:
>
> Hello,
>
> Could you review the updated fix:
>   http://cr.openjdk.java.net/~alexsch/8164032/webrev.01
>
> The generic transform is used for the backing store image scaling.

As far as I understand the current fix will not work if the scale was 
changed(the JViewport will use old buffer)?

It seems that the new local AbstractMultiResolutionImage contain only 
one image variant inside and looks quite similar to the VolatileImage, 
probably we can change this cache from BufferedImage to VolatileImage? 
In this case the scale of the VI will be the same as "g":
g.getDeviceConfiguration().createCompatibleVolatileImage()


> On 8/15/2016 4:58 PM, Sergey Bylokhov wrote:
>> Hi, Alexandr.
>> I doubt that getScaleX/getScaleY can be used here because the scale
>> can be generic(translate+rotate+scale). How this cache will work if
>> transform will be changed after we save "backingStoreImage"?
>>
>> On 15.08.16 16:16, Alexandr Scherbatiy wrote:
>>>
>>> Hello,
>>>
>>> Could you review the fix:
>>>   bug: https://bugs.openjdk.java.net/browse/JDK-8164032
>>>   webrev: http://cr.openjdk.java.net/~alexsch/8164032/webrev.00
>>>
>>>   The fix scales the JViewport backing store image when graphics
>>> transform is not identity.
>>>
>>>  Thanks,
>>>  Alexandr.
>>>
>>
>>
>


-- 
Best regards, Sergey.